CN108447280B - Traffic signal dredging and guiding mixed mode control method - Google Patents
Traffic signal dredging and guiding mixed mode control method Download PDFInfo
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- CN108447280B CN108447280B CN201710083949.6A CN201710083949A CN108447280B CN 108447280 B CN108447280 B CN 108447280B CN 201710083949 A CN201710083949 A CN 201710083949A CN 108447280 B CN108447280 B CN 108447280B
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Abstract
The invention relates to the field of traffic signal modes, and discloses a traffic signal mixed green wave mode control method capable of guiding or dredging in a traffic area at the same time, which comprises the following steps: calculating a configuration ratio mode and acquiring the time for starting and driving the jammed motorcade of each road section of the controlled road network; calculating and configuring the mixing time difference of each intersection to the mixed green wave origin; after the operation completes the time difference, the ratio mode is run. The invention provides a high-efficiency traffic signal special mode with multiple combined composite functions, the efficiency is improved by more than 15 percent compared with a one-dimensional blocking-dredging green wave signal mode, is improved by more than 50 percent compared with a one-dimensional guiding green wave signal mode, is improved by more than 65 percent compared with a ratio signal mode, and greatly improves the traffic and the control efficiency thereof.
Description
Technical Field
The present invention relates to the field of traffic signal mode control. In particular to a mixed green wave mode control method for dredging traffic signal operation and guiding various combinations in two cross directions of the whole road network.
Background
There are two basic modes of traffic signals: ratio mode, green wave mode. The ratio mode allows traffic flow in each direction at each intersection to be released and stopped simultaneously according to the period, and the maximum-energy-running release time of each release is multiplied by the distance of legal speed per hour of the road. The green mode partially solves this problem. The green wave can greatly reduce waiting for traffic flow consistent with the flow direction of the green wave; it can only travel in parallel directions. Two-dimensional green wave guiding modes have been proposed that further improve the guiding efficiency by two cross directions. More recently, a jam green wave evacuation mode has been proposed in which traffic signal green waves in the opposite direction to the traffic being controlled are used to evacuate the jam. If the combined operation with green wave functions such as green wave guiding and the like can be simultaneously realized, the high-efficiency special signal can be provided, and the vehicle treatment can be reduced.
Disclosure of Invention
The invention aims to realize the functions of guiding and dredging two green waves simultaneously on the whole road network, thereby further improving the use effect of traffic signals, reducing waiting of traffic flows and improving the traffic and control efficiency thereof.
The invention provides a solution for realizing the aim, and the main idea is to set one of two flow directions of a traffic area as a main green wave flow direction, and the other cross direction as an auxiliary green wave flow direction, so that the starting time of the starting point of the time difference of a main green wave channel is sequentially delayed by a time difference from the original simultaneous design, the time difference is configured when each road section is properly used, and as a result, the traffic signals of the whole area just form a mixed green wave mode of dredging and guiding different combinations in the two cross directions. The method comprises the following specific steps:
a control method for dredging and guiding mixed green wave mode of road traffic signal network and its control system is characterized by comprising the following steps:
s1 configuration ratio type signal mode and obtaining road section congestion fleet starting time and driving time among all intersections in an MxN intersection formed four-sided type, M-row and N-row road network area, wherein the congestion fleet starting time is equal to a fleet starting coefficient x fleet length, the fleet starting coefficient range is 0.14-0.22, 0.18 is selected, and the unit: second/meter, the value can be dynamically adjusted, and the driving time = the length of the road section divided by the legal speed of the road section;
s2 calculates the mixed green wave time difference for each intersection: 1) determining and configuring the mixed green wave double-different-group origin intersection of the area: setting a mixed green wave time difference starting point at a traffic jam flow direction tail end and a guide flow direction starting point intersection of the area, setting intersections at a corner of the area called as mixed green wave double-different-group original points, setting one of the two flow directions as a main flow direction and the other as an auxiliary flow direction, setting the guide flow direction to be the same as the guide green wave flow direction, setting the jam flow direction to be opposite to the block green wave dredging flow direction, setting the guide green wave starting point as a guide flow direction channel starting point intersection, and setting the block green wave starting point as a block flow direction channel tail end intersection, and 2) calculating the main flow direction green wave time difference: each intersection of the region calculates the sum of the elapsed time of all the road sections between the intersection points for the green wave time difference with the main flow channel in which the intersection is located: if the main flow channel is guiding, summing up the running time of each road section, if the main flow channel is congested, summing up the starting time of congested fleet of each road section, 3) calculating the sum of the running time of each road section between the green wave starting point crossing of the main flow channel and the green wave starting point crossing of the corner upper road as the green wave starting point of the secondary flow channel, corresponding to the main flow time, if the main flow channel is guiding, summing up the starting time of congested fleet of each road section of the channel, if the main flow channel is congested, summing up the running time of each road section of the channel, 4) calculating and configuring the sum of the two time differences: the green wave time difference of the main diversion channel intersection of each intersection is added with the green wave time difference of the secondary diversion channel intersection of the starting point intersection of the green wave of the channel where the green wave of the main diversion channel intersection is located relative to the mixed green wave origin;
s3 the respective ratio modes are operated after the operation is completed with the red light/no signal mixed green time difference before the start of the new cycle.
The mixed green wave control method comprises the following steps: characterized in that said S1 further comprises: the start time of the platoon described in S11 is equal to the platoon start coefficient congestion coefficient road segment length, where the congestion coefficient range is a number less than or equal to 1, which indicates severe congestion.
Step S11 in the hybrid green wave control method according to the present invention: the method is characterized by further comprising the following steps: and S12, multiplying the length of the congested fleet minus the length of the upstream air intersection of the traffic flow by a number less than or equal to 1.
Step S11 in the hybrid green wave control method according to the present invention: the method is characterized by further comprising the following steps: and S13, adding the length of the congested fleet to the length of the full intersection upstream of the traffic flow.
Step S11 in the hybrid green wave control method according to the present invention: the method is characterized by further comprising the following steps: and S14, when the motorcade is started, the motorcade starting coefficient congestion coefficient road segment length evacuation coefficient is equal to, wherein the evacuation coefficient range is a number which is more than or equal to 1, the current situation of evacuation is indicated when the evacuation coefficient range is equal to 1, and the distance of the motorcade is required to be drawn when the evacuation coefficient range is more than 1.
The mixed green wave control method comprises the following steps: characterized in that said S1 further comprises: s15 subtracting the braking time of legal speed from the driving time.
The mixed green wave control method comprises the following steps: characterized in that said S2 further comprises:
s21 calculates the mixed green wave time difference for each intersection: 1) determining and configuring the intersection with the mixed green wave of the area and the same group of origin points: if the duplicate is double guidance, setting two intersection points of the initial guide flow direction end points of the area as double-same green wave time difference starting points, if the duplicate is double dredging, setting two intersection points of the dredging flow direction end points of the area as double-same green wave time difference starting points, wherein the intersection points are all intersection points at an area corner, called as double-same green wave origin points, and setting one of the two flow directions as a main flow direction and the other as a secondary flow direction, the guide flow direction is the same as the guide green wave flow direction, the dredging flow direction is opposite to the dredging green wave flow direction, the guide green wave starting point is the start point of the guide flow direction channel, the dredging green wave starting point is the end point of the dredging flow direction channel, and 2) calculating the main flow direction double-same green wave time difference: each intersection of the region calculates the sum of the elapsed time of all the road sections between the intersection points for the green wave time difference with the main flow channel in which the intersection is located: if the duplicate is guiding, summing the running time of each road section of the main flow channel, and if the duplicate is dredging, summing the congested fleet starting time of each road section of the main flow channel, 3) calculating the sum of the running time of each road section between the green wave starting points of the main flow channel and the green wave starting points of the corner upper road for each road section of the corner upper road, corresponding to the main flow time, if the main flow is guiding, summing the running time of each road section of the channel of the secondary flow channel, and if the main flow is congested, summing the congested fleet starting time of each road section of the channel of the secondary flow channel, 4) configuring the sum of the two time differences: and each intersection adds the time difference of the main flow green wave of the intersection to the time difference of the secondary flow green wave of the intersection of the starting point of the green wave of the channel to which the intersection belongs to the mixed green wave origin.
The mixed green wave control method comprises the following steps: characterized in that the step S3 further comprises the steps of: s31 the foregoing operation is completed by reducing the mixed green wave time difference to 0 second by second.
The mixed green wave control method comprises the following steps: characterized in that the step S3 further comprises the steps of: s32 the aforementioned operation is completed by adding the timer from 0 to the set mixed green time second by second.
Note 1: the road network nodes of the network are intersections formed by gathering multiple road sections and are controlled by the traffic light signal network system corresponding to the intersections; note: 1) the road section refers to a road between two adjacent intersections, 2) the channel refers to a plurality of road sections and intersections which are connected in series, and the channel which penetrates through two ends of the road network is called a straight channel.
Note 2: the road network range and the characteristics comprise the number of intersections controlled by the whole signal system, how to distribute, the length of each road section, time and the like; the time consumption comprises the time consumption for starting a jammed motorcade and the time consumption for driving, wherein the time consumption for starting the jammed motorcade refers to the time consumed by moving from a first vehicle to a tail vehicle of the motorcade in the jammed motorcade, and the time consumption for driving refers to the time consumed by driving the vehicles at the legal speed per hour of the road section; recording MxN intersections, M columns of straight roads and N rows of straight roads of a road network as { M, N } or { (0,0), (M-1, N-1) }, wherein (,) represents intersection coordinates; the set of column links is denoted by { M, N-1} { = = }, which indicates the total number of columns M, each column of straight roads includes N-1 links, the set of M-th column of straight road links is denoted by M { = = }, and = represents (N-1) column link times; the row road segment set is marked as { N, M-1} { = = }, which represents the total number of rows N, each row of straight roads comprises M-1 road segments, the time set of the N-th row of straight road segments is marked as N { = = }, and = represents (M-1) road segments; total number of road segments N (M-1) + M (N-1), and when there are less than or more than 4 roads in the region, the total number of road segments is less than or more than N (M-1) + M (N-1); the element numerical values in the set represent the length of a corresponding road section, the time of starting a jammed motorcade or the time of driving, correction and the like; the segments that are parallel to each other need not be absolutely parallel, of equal length.
Note 3: the green wave time difference of the flow direction channel intersection refers to the sum of the time of each road section in the intersection channel time-use set between one road intersection and the channel green wave starting time of the road intersection; when the green wave is sparse and is congested, when the congested fleet is started, a channel green wave starting point intersection is a traffic flow end intersection, and the green wave is guided, when the congested fleet is driving, a channel green wave starting point intersection is a traffic flow starting end intersection, a green wave time difference flowing to the channel intersection is generated, which is also called an intersection channel time difference, and when the green wave is combined with the intersection channel, the set of the green wave starting point intersection and the green wave time difference is called d # { (r), and the green wave starting point intersection are combined when a road section { M, N-1} { = } or a road section { N, M-1} { = } set is added into an intersection 0, d represents the vehicle flow direction, which can be southwest or northwest, and the like, and # represents intersection coordinates (i, j), namely, d (i, j) { (r }, d and 0 mark the guiding or sparse flow direction at the positions in { (i) =, such as north (6,2) { = =,0} represents an upper intersection i =6 of the congested traffic flow network, j =2 and the sum of the times of congestion and fleet start of the road segments between the traffic flow direction end point calculation point, i.e. the most northern crossing (6,4), and if 0 is on the left, i.e. north (6,2) {0, = = } represents the sum of the times of travel of the road segments between the road network entry i =6, j =2, which leads the flow direction to the north, i.e. the most southern crossing (6,0), and the traffic flow direction end point calculation point; when the channel penetrates through the road network, # represents a straight road number, such as 1{0, = = } in west represents a sum subset set when a road segment congestion fleet consisting of all intersections j =1 in the road network for dredging the traffic to west starts, the west-end intersection is a calculation intersection, the section of the road is congested and the starting time of the fleet is =0, and south 4{0, = = } represents the starting time of the congested fleet of the south dredging flow direction i =4 channels, the south-most intersection is a calculation intersection, the traffic jam fleet is started by 0, if west 1{ = =,0} represents the sum of the driving time of the road sections formed by all intersections with j =1 on the road network guiding the traffic to the west, the east end intersection is the calculation intersection, the driving time of the road section =0, and south 4{ = =,0} represents the time subset for guiding the south to flow to i =4 channels, the most north end intersection is the starting calculation intersection, and the driving time is 0.
The invention has the following advantages: the 7x5 road network calculation experiment shows that the mixed green wave signal can increase the guiding effect in the other direction while dredging the traffic jam direction, and provides a plurality of high-efficiency traffic signal special modes with different combination and composite functions, the efficiency is improved by 15 percent compared with a one-dimensional green wave dredging and blocking signal mode, is improved by 50 percent compared with a one-dimensional green wave guiding signal mode, is improved by 65 percent compared with a ratio signal mode, and the traffic and the control efficiency are greatly improved.
Drawings
FIG. 1 is a schematic diagram of a hybrid dual/heterogeneous mode and its road network;
FIG. 2 is a schematic diagram of a road network structure, a signal control system and a hybrid dual/heterogeneous mode time allocation operation;
FIG. 3 is a schematic diagram of road network operation progress at 0 second from the start of mixing of two different groups of green waves;
FIG. 4 is a schematic diagram of road network operation progress at 135 seconds from the start of mixing of dual-heterogeneous group green waves;
FIG. 5 is a schematic flow chart of a hybrid dual-different group green wave control method;
numbered indices in the drawings:
FIG. 1: 1-road network, 2-intersection, 3-south channel 7 north flow direction dredging green wave, 4-east channel 5 west flow direction green wave, 5-north traffic flow each channel to be guided, 6-east traffic flow each channel to be dredged;
FIG. 2: 1-network intersection node code identification starting point (0,0) is the lower left corner intersection of a road network, 2- (0,0), (6,4) are road network marks, 3-intersection, 4-signal lamp, 5-driving motorcade, 6-intersection signal controller, 7-internet, 8-central control system, 9-two-dimensional origin mark Q and small octagon node and coordinates thereof (6,0), 10-intersection interval-when the jammed motorcade starts/when the driving is marked as # - #/: unit: meter-second/second, 11-main green wave flow arrow points to the left-west, number 6, denoted as z6, f1 at the upper left corner is the leaving number 1 sub green wave, 12-number 4 sub green wave flow, denoted as f4 dotted arrow points to the up-north, and z1 at the lower left corner is the leaving number 1 main green wave; in addition, the lengths of the primary and secondary green wave flow arrows represent estimated time durations, e.g., length f6 represents about 18 seconds, length f4 about 43 seconds, and z10 is 45 seconds, 13-directing north traffic flow lanes, 14-congestion east traffic flow lanes; the green wave distribution state in the figure is 270 seconds; the number in the square brackets is the green wave dredging and blocking time difference of the crossing flow direction channel, and the horizontal and vertical arrangement corresponds to the corresponding crossing of the main green wave channel and the auxiliary green wave channel; in the following figures, solid line open arrows marked by general z represent the main green wave and the flow direction thereof, and dashed line open arrows marked by f represent the main green wave and the flow direction thereof;
FIG. 3: 1-east 1 channel 3 road section is heavily congested, short wide black arrow indicates the traffic flow of the congested road section and the driving direction thereof, the east direction in the figure is the congested traffic flow direction, the north is the traffic flow guiding direction, and the two white arrows at the edge of the figure indicate two crossed congestion dredging and green wave guiding directions: west and north, 2-north 2 channels to be guided traffic, 3-green time difference of main flow channel intersection (4,5) is 45, like it is indicated by number in brackets, 4-green time difference of sub flow channel intersection (6,2) is 20, like it is indicated by number in brackets, 5-mixed green time difference of intersection is 0, 5-mixed green time difference of intersection starting point intersection (6, 0); and when the initial time is 0 second, the all east flow direction channel section is in a full-car state: the vehicle can not move forward; the black arrows across the intersection in the following figures indicate that a part of the traffic flow passes through the rear part of the intersection;
FIG. 4: represents the link state at 135 seconds after the mixed green wave enters the 2 nd cycle:
the east 1 channel intersection (6,0) runs for 135 seconds to finish the period 2 of main green wave blockage removal and green light elimination in the east line due to the mixing time difference [0+0] and waits to be switched to the auxiliary green wave guide north line green light again after 45 seconds, after the intersection (5,0) finishes [27+0] within 135 seconds and the cycle 1 is 90 seconds, the main green wave east green light is operated for 18 seconds, after the intersection (4, 0) finishes [45+0] and the cycle 1 is 90 seconds, the main green wave east green light is just ready to be switched back, after the intersection (3, 0) finishes [68+0] and the main green wave blockage removal east green light is operated for 45 seconds, the auxiliary green wave guide north green light is operated for 22 seconds, after the intersection (2, 0) finishes [95+0], the main green wave blockage removal east green light is started for 40 seconds, after the intersection (1, 0) finishes [113+0] and the main green wave east green light is started for 22 seconds, and at the moment, the intersection (0,0) finishes [136+0] within 1 second and cannot start the main green wave east green light;
after the east 2 channel intersection (6,1) completes the period of [0+12] and 90 seconds, the main green wave blocking-dredging east green light is operated again for 33 seconds, after the intersection (5, 1) completes the period of [27+12] and 90 seconds, the main green wave blocking-dredging east green light is operated again for 6 seconds, after the intersection (4, 1) completes the period of [45+12] and the main green wave blocking-east green light for 45 seconds, the auxiliary green wave guiding north green light is operated for 33 seconds, after the intersection (3, 1) completes the period of [68+12] and the main green wave blocking-dredging east green light for 45 seconds, the auxiliary green wave guiding north green light is operated for 10 seconds, after the intersection (2, 1) completes the period of [95+12], the main green wave east green light is operated for 28 seconds, after the intersection (1, 1) completes the period of [113+12], the main green wave east green light is operated for 10 seconds, and at the same time, when the intersection (0, 1) completes the period of [136+12] and the main green wave can not be operated;
running a main green wave for dredging east green lights for 25 seconds after the east 3 channel intersection (6,2) runs for [0+20] and 90 seconds, running a secondary green wave for guiding the north green lights for 43 seconds after the intersection (5,2) runs for [27+20] and 45 seconds of main green wave east running, running the secondary green wave for guiding the north green lights for 25 seconds after the intersection (4,2) runs for [45+20] and 45 seconds of main green wave east running, running the secondary green wave for guiding the north green lights for 2 seconds after the intersection (3,2) runs for [68+20] and 45 seconds of main green wave for dredging the east green lights, running the main green wave for dredging the east green lights for 20 seconds after the intersection (2,2) runs for [95+20], running the main green wave for dredging the east green lights for 2 seconds after the intersection (1,2) runs for [113+20], and running the main green wave for dredging the east green lights for 2 seconds after the intersection (0,2) runs for 21 seconds, does not run for [136+20] and can not start the east green lights;
after the east 4 channel intersection (6,3) finishes the period of [0+30] and 90, the main green wave is operated to block the east for 15 seconds, after the intersection (5,3) finishes the period of [27+30] and the main green wave east for green light for 45 seconds, the auxiliary green wave is operated to guide the north for 33 seconds, after the intersection (4,3) finishes the period of [45+30] and the main green wave east for 45 seconds, the auxiliary green wave is operated to guide the north for 15 seconds, after the intersection (3,3) finishes the period of [68+30], the main green wave is operated to block the east for 37 seconds, and after the intersection (2,3) finishes the period of [95+30], the main green wave is operated to block the east for 10 seconds;
the east 5 channel intersection (6,4) operates the main green wave for dredging the east for 3 seconds after completing the period of [0+42] and 90 seconds, the intersection (5,4) operates the auxiliary green wave for guiding the north for 21 seconds after completing the period of [27+42] and the main green wave for east for green light for 45 seconds, the intersection (4,4) operates the auxiliary green wave for guiding the north for 3 seconds after completing the period of [45+42] and the main green wave for east for green light for 45 seconds, the intersection (3,4) operates the main green wave for dredging the east for green light for 25 seconds after completing the period of [68+42], and the intersection (2,4) cannot start the main green wave for east for green light by [95+42] after 2 seconds;
other intersections have no traffic signal at running their respective mix time difference.
Detailed Description
One embodiment of the present invention is described in detail with reference to the accompanying drawings:
a method for creating traffic flow for road network such as the intersections shown in figure 2 such as figures 2-3, traffic flow for each intersection shown in figure 2-5, straight-going-left-going two-phase signal light figure 2-4 and intersection signal control machine such as figures 2-6 or adding a sensor, controlling the traffic flow through communication network such as figures 2-7 by central control system such as figures 2-8, controlling the operation efficiency as shown in figures 3-4 and executing mixed green wave double-different-group mode control method such as figure 5 is shown in figure 5.
As shown in fig. 2, the road network characteristics include an intersection start coordinate at a lower left corner, fig. 2-1(0,0), fig. 2-2{ (0,0), (6,4) }, or a road network {7,5}, which has 35 intersections, 7 north-south channels, 5 east-west channels, a time-use set of straight road segments {7,4} { = = } and 28 north-south segments, a time-use set of straight road segments {5,6} { = = }, 30 east-west segments, and a # - #/# label is a length of each road segment, and a time of start/driving of a fleet is as shown in fig. 2-10, and the unit: meter-second/second, when starting a congested fleet, = a fleet starting coefficient, congestion coefficient, road segment length, and a dredging coefficient, wherein the congestion coefficient range is a number less than or equal to 1, and indicates severe congestion, the dredging coefficient range is a number greater than or equal to 1, and 1 indicates dredging according to the current situation, the fleet starting coefficient obtains a value range from 0.14 to 0.22 according to a calculation experiment, the median is 0.18, the severe congestion is calculated according to the congestion coefficient =1, the fleet length is equal to the road segment length, the dredging coefficient is 1, and the current dredging is determined, and the influence of the intersection width is ignored, so that when starting the congested fleet of each road segment, the length of each road segment is x0.18, and when driving the vehicle is calculated according to a legal speed of 45 kilometers, for example; the distance between intersections (5,0) and (6,0) is 150 meters, the time for starting a congested fleet is 27 seconds/12 seconds, the distance between intersections (5,2) and (5,3) is 125 meters, and the time for starting the congested fleet is 23 seconds/10 seconds; the time-use set of each section of each east channel comprises the following steps: from east 1{ = } to east 5{ = = } the value is { 23/10, 18/8, 27/12, 23/10, 18/8, 27/12 }, and each time-use set of each road segment of each southbound channel includes: values from south 1{ = = } to east 5{ = = } are { 27/12,18/8,23/10,27/12 }.
As shown in fig. 2, the mixed green wave dual-heterogeneous mode setting includes a mixed time difference origin, that is, the secondary flow green wave starting intersection is an intersection (6,0) as shown in fig. 2-9, the primary green wave flow is west and is congestion relief, the congested traffic flow is east, all z # s are as shown in fig. 2-11, the secondary green wave is north and all f # s are as shown in fig. 2-12, the leading traffic flow is north, the primary green wave starting point set is columns 6{ (6,0), (6,1), (6,2), (6,3), (6,4) }, and the primary green wave flow intersection channel congestion fleet starting time sum set includes: east 1 to east 5 values are {140,113,95,68,45,27,0}, where the rightmost 0 is the corresponding value in the remaining 6 values quote the row straight lane {5,6} { = = } at 0 congested fleet start of the row of joined primary streams to the green wave starting point; the sum set of the traffic time guided by the secondary flow direction intersection channel comprises: south 6{ = = {0,12,20,30,42}, where the leftmost 0 is the corresponding value in the remaining 4 numeric value starter columns {7,4} { = } when 0 runs are added to the secondary flow starting point of the column toward the green wave.
As shown in fig. 5, the method for controlling the hybrid green wave dual-different mode includes the following steps:
s1 configures a default ratiometric signal pattern: (1) the method comprises the following steps that the main direction of signals at all intersections of a road network = north, the period duration =90 seconds, the green time ratio =1, the green time ratio of each direction is 45 seconds, the green time ratio of a straight-left phase =2, the straight-going phase is 30 seconds, and the left-going phase is 15 seconds; (2) and when acquiring the road sections among the intersections in the road network area with 7 rows and 5 rows formed by 7x5 intersections: when a congested fleet is started/used for driving, wherein the congested fleet is started = a fleet starting coefficient, a congestion coefficient, a road segment length and a dredging coefficient, wherein the congestion coefficient range is a number smaller than or equal to 1 and represents severe congestion, the dredging coefficient range is a number larger than or equal to 1 and is equal to 1, namely dredging is performed according to the current situation, the fleet starting coefficient is calculated according to a calculation experiment to obtain a value range of 0.14 to 0.22, the median is 0.18, the severe congestion is calculated according to the congestion coefficient =1, the fleet length is equal to the road segment length, the dredging coefficient is 1, the current dredging is performed, and the influence of the intersection width is ignored, so that each road segment is started when being congested = each road segment length x0.18, and the driving time is calculated according to an assumed legal time speed of 45 kilometers, for example; the distance between intersections (5,0) and (6,0) is 150 meters, the time for starting a congested fleet is 27 seconds/12 seconds, the distance between intersections (5,2) and (5,3) is 125 meters, and the time is 23 seconds/10 seconds; thus, the time-use set configuration of each segment of each east channel comprises: from east 1{ = } to east 5{ = = } the value is { 23/10, 18/8, 27/12, 23/10, 18/8, 27/12 }, and each time-use set of each road segment of each southbound channel includes: the value from south 1{ = = } to east 5{ = = = } is { 27/12,18/8,23/10,27/12 };
s2 calculates a configured mixed green time difference: 1) setting and determining the mixed green wave double-different-group origin point intersection of the vehicles in the area: intersection (6,0), primary and secondary flow direction: the main flow is guided to the east, the secondary flow is guided to the north, the corresponding main green wave flows to the west, the secondary green wave flows to the north, and the intersection point of the tail end of the congestion flow and the initial end of the guiding flow is crossed: intersection (6,0) is the mixed mode origin, and the intersection set of the starting points of the main green wave channel { (6,0), (6,1), (6,2), (6,3), (6,4) }, 2) calculates and allocates the time difference of the main flow direction green wave: each intersection of the region calculates the sum of the elapsed time of all the road sections between the intersection points for the green wave time difference with the main flow channel in which the intersection is located: the main flow direction is congestion, and the time for starting the congested fleet of each road section is summed, 3) the sum of the time for each road section between the green wave starting points of the main flow direction and the green wave starting points of the channels at the upper corner is calculated and configured, and the sum corresponds to the time for the main flow direction, and the main flow direction is congestion, so that the secondary flow direction is guiding, and the sum is used for the driving of each road section, 4) the green wave time difference of the main flow direction channel intersection of each intersection is added with the green wave time difference of the green wave starting point intersection of the channel in which the intersection is located to the intersection of the mixed green wave origin; the specific calculation result is as follows:
the main green wave time difference of each channel intersection is collected from east 1{ } to east 5{ } values {136,113,95,68,45,27,0},
the secondary green wave time difference of each intersection of the north 6 channel is set to north 6{ } values {0,12,20,30,42},
mixed green wave time difference set:
east 1{ } {136+0,113+0,95+0,68+0,45+0,27+0,0+0},
east 2{ } = 136+12,113+12,95+12,68+12,45+12,27+12,0+12},
east 3{ } 26 +20,113+20,95+20,68+20,45+20,27+45,0+20},
east 4{ } 136+30,113+30,95+30,68+30,45+30,27+68,0+30},
east 5{ } { = {136+42,113+42,95+42,68+42,45+42,27+95,0+42 };
in particular, to intersections, such as, for example,
the 3 rd intersection of the east 4 lane is intersection (2,3), whose mixed green wave time difference = [95] + [30] =125,
the 1 st intersection of the east 5 lane is intersection (0, 4) in the upper left corner of the area, whose mixed green wave time difference = [136] + [42] = 178;
after the operation of S3 finishes the red light or the green wave time difference without signal mixing, the ratio mode is operated: with a mixed green time difference >0, red or no signal, subtract 1, wait for the next second until this time difference =0, and begin to execute the ratio mode.
Claims (7)
1. A road network traffic signal block dredging and guide mixed mode control method is characterized by at least comprising the following steps:
s1 configures a ratio signal pattern and obtains a four-sided type, M rows, and N intersections in an area of a road network, where the four-sided type, M rows, and N intersections form a congested vehicle fleet, which is equal to a vehicle fleet starting coefficient, i.e., a vehicle fleet length, where the vehicle fleet starting coefficient ranges from 0.14 to 0.22, and the unit: the value can be dynamically adjusted, and the length of a road section is divided by the legal speed of the road section when the vehicle runs;
s2 calculates the mixed green wave time difference for each intersection: 1) determining and configuring the mixed green wave double-different-group origin intersection of the area: setting a mixed green wave time difference starting point at a traffic jam flow direction tail end and a guide flow direction starting point intersection of the area, setting intersections at a corner of the area called as mixed green wave double-different-group original points, setting one of the two flow directions as a main flow direction and the other as an auxiliary flow direction, setting the guide flow direction to be the same as the guide green wave flow direction, setting the jam flow direction to be opposite to the block green wave dredging flow direction, setting the block green wave starting point as a guide flow direction channel starting point intersection, and setting the block green wave starting point as a block flow direction tail end intersection, and 2) calculating the main flow direction green wave time difference: the sum of the time spent required by the green waves of all the road sections between each intersection of the area and the intersection of the main flow channel where the intersection is located by the green wave time difference calculation point is as follows: if the main flow direction is guiding, summing the running time for each road section of the channel, and if the main flow direction is congested, summing the running time for each road section of the channel, and if the main flow direction is guiding, summing the running time for each road section of the channel, and if the main flow direction is congested, summing the running time for each road section of the channel, and 4) configuring the sum of the two time differences: each intersection adds the time difference of the main flow green wave of the intersection to the time difference of the sub-flow green wave of the intersection of the starting point of the green wave of the channel to which the intersection is positioned to the mixed green wave original point;
s3 runs the ratio signals after the operation is completed with the red light/no signal mixed green time difference before the new cycle begins.
2. The traffic signal jam-removing and guide mixed mode control method according to claim 1, wherein when the jammed fleet starts, the method is characterized in that:
the congestion fleet starting time at S11 is equal to a fleet starting coefficient congestion coefficient road segment length, where a congestion coefficient range is a number less than or equal to 1, and a congestion coefficient range equal to 1 indicates severe congestion.
3. The traffic signal jam-shedding guide mixed mode control method according to claim 1, wherein the start of the jammed fleet is characterized in that
And S14, when the congested fleet is started, the congestion coefficient is equal to the fleet starting coefficient, the congestion coefficient is equal to the road section length, the evacuation coefficient range is a number which is more than or equal to 1, the congestion coefficient indicates that the congestion is evacuated as the current situation, and when the congestion coefficient range is more than 1, the distance is required to be drawn for the fleet.
4. The traffic signal blockage relieving and guiding mixed mode control method according to claim 1, is characterized in that when the vehicle is running:
and S15, subtracting the braking time of legal vehicle speed from the driving time.
5. The mixed mode control method for traffic signal jam clearance guidance according to claim 1, wherein the step S2 further includes:
s21 calculates the mixed green wave time difference for each intersection: 1) determining and configuring the intersection with the mixed green wave of the area and the same group of origin points: if the double-channel is double-guide, setting two guide flow direction starting end point intersection intersections in the area as double-channel green wave time difference starting points, if the double-channel is double-channel, setting two channel blocking flow direction end point intersection intersections in the area as double-channel green wave time difference starting points, setting the double-channel blocking flow direction end point intersection and the double-channel blocking flow direction end point intersection in the area as area corner intersections, called as double-channel green wave original points, setting one of the two flow directions as a main flow direction and the other as a secondary flow direction, setting the guide flow direction to be the same as the guide green wave flow direction, setting the channel blocking flow direction to be opposite to the channel blocking flow direction, setting the guide green wave starting point as the guide flow direction channel starting point intersection, setting the channel blocking flow direction end point as the channel blocking flow direction starting point, and 2) calculating the main flow direction double-channel green wave time difference: the sum of the time spent required by the green waves of all the road sections between each intersection of the area and the intersection of the main flow channel where the intersection is located by the green wave time difference calculation point is as follows: if the double is guiding, summing the running time of each road section of the main flow channel, and if the double is dredging, summing the running time of each road section of the main flow channel by using congested fleet starting time, 3) calculating the sum of the running time of each road section between the green wave starting points of the main flow channel and the green wave starting points of the corner upper roads as secondary flow green wave starting points as secondary flow double-same green wave time difference, corresponding to the running time of the main flow channel, if the main flow channel is guiding, summing the running time of each road section of the main flow channel by using the secondary flow channel, and if the main flow channel is congested, summing the running time of each road section of the secondary flow channel by using the secondary flow channel, 4) configuring the sum of the two time differences of the main flow double-same green wave time difference and the secondary flow double-same green wave time difference: and each intersection adds the time difference of the main flow green wave of the intersection to the time difference of the secondary flow green wave of the intersection of the starting point of the green wave of the channel to which the intersection belongs to the mixed green wave origin.
6. The mixed mode control method for traffic signal jam clearance guidance according to claim 1, wherein the step S3 further includes:
s31 the operation is completed by reducing the mixed green wave time difference to 0 second by second.
7. The mixed mode control method for traffic signal jam clearance guidance according to claim 1, wherein the step S3 further includes:
s32 the operation is completed by adding the timer from 0 to the set mixed green time difference one by one.
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